Mounting for resilient cushions.



F. L. LANE L H. J. MITCHELL.

MOUNTING FOR RBSILIBNT CUSHIONS.

APPLICATION rILnn MAY31, 1912.

1,096,846 Patented May 19, 1914u J0 JZJJSZJ l J0 i3 Jz lll@ :2l`ywmsmmlpmmw 'IIllllll IIII1IIIIIIIIIIII\\"\ a l/Illllllllliwlllllll 9r/// W 2 J5 19 .J5 J [9 FATE i SATS FFIQFL,

FRANKLIN L. LANE AND HARRISON J. MITCHELL, OF BELOIT, WISCONSIN,ASSIGNORS TO THE BERLIN MACHINE WORKS, OF BELOIT, WISCONSIN, A.CORPORATION 0F WISCONSIN.

MOUNTING FOR RESILIENT CUSI'IIONS.

To all whom it may concern "le it known that we, FRANKLIN L. LANE andHARRISON J. hairrcHnLL, residing` at Beloit, in the county of Rock andState ot lVisconsin, have invented certain new and useful. Improvementsin Mountings for ltosilient Cushions, oit which the following is aspecilication.

This invention concerns or pertains to novel features and improvementsin con veyers, carriers, endless beds, and the like, and relates moreparticularly or especially to those equipped, with resilient or yieldingfriction cushions.

rlhe preferred embodiments oit the invention described in detail beloware especially applicable tor use in connection with endless carriersfor woml-workingr machinery, such for example, as sand-paperino`machines and planers, but their use, however, as will be apparent, is inno way limited to such class oit devices.

@ne otI the leading objects and purposes oit the invention is theprovision et a cushion provided with el'lecti ve and eliicient holding;-means for maintaining it in proper place on the carrier, whereby theboard or other article carried or transported by the conveyor is firmlygripped and prevented troni slipping' as it passes through the machineand is being' operated upon.

ln order that those skilled in the art may have a :t'ull and Completeunderstanding o'lf the invention, its structural Ytentures andadvantages, a plurality ot' embodiments of the saine have beenillustrated in the accompanying drawings which form a part oit thisspecification, and to which reference should be made.

In these drawings: Figure l shows a bar or slat of a conveyor or endlessbed supplied with a plurality of elastic cushions incorporating ourinvention. Figs. 2, 3, 4t, and 5, illustrate in cross-section ditl'erentmeans ttor effectively holding' such cushions to the bars or slats ot'the conveyor; Fig. 6 shows in cross-section still another method oithold- `ing the cushions, and Fie'. 7 is an enlarged fragmentary sectionshowingl the action ot `the cushion under compression.

In sand-paperino; or planing machines, it is desirable or necessary inthose devices equipped with endless traveling beds, partieularly whereshort stock is used, to pre- Speccaton of Letters Patent.

Application filed May 31, 1912.

Patented May 19, 1914.

serial No. 700,577.

vent the boards from slipping on such bed or conveyor while being; actedupon by the sand-paperino drums or planing-cyliiuler. .lt has beensuggested heretofore to equip the iaee of such an endless carrier or bedwith rubber or other suitable resilient cushions, preferably staggered,on which the board rests during); its travel through the machine.Ditliculty has been experienced in holding such cushions electivelyv andtixedly on the conveyor' to prevent their being worked or pushed out ofplace or torn from position while the board is beine` operated upon bythe unafhanism. In other words, the strain on these cushions isconsiderable, and must be cared ttor in the holding-devices referred to.

The present invention involves the employment ot rubber or othersuitable yield ingr cushions ot' such shape as to secure a suction-holdon the board, the cushions bein aheld to the slats or bars ol theeonveyer or movable bed by a new and ilnproved means possessing an.unusual degree of ellirieney in their holding or retainingefl'ect.

In Fig'. l el the drawings, the cross-bar or stat 9 ot an endless bed orconveyer has 'fastened thereto a plurality oit cylindrical rubbercushions '10, 10, each of which has embedded in its base a canvas orother suitable t'abric 1l, which, as will be readily understood,sti'liens and strengthens the base oi the rubber. Also in the particularembodiment of the invention shown in Fig. f2, each ot these roundcushions has in `its top face a concentric cylindrical cavity 1Qaecommodating a round retaining disk or washer' 13 oit less thicknessthan the depth ot the recess 12, such disk being' centrally conicallyapertured Ylor the accommodation ot the conical-shaped head 111 ot ascrew 15 which extends through a. central hole 16 in the rubber cushion,the threads oi such screw engaging and (ro-acting with those ot athreaded hole 17 in the bar or slat 9. 'lhat is to say, in this way,each rubber cushion by means of its screw, is securely fastened to thesupport or bar 9, and the space or cavity above the retaining disk orwasher makes of the cushion a suction cup possessing a marked degree ofholding-eifect on the board or other member placed thereon and conveyedthereby. Obviously, the rubber` being yielding, constitutes a resilientcushion, and a series of cross-barseach equipped with a group orplurality of such cushions provides an endless bed or conveyer yieldingin character, and pre\'fenting the board o-r other member from slippingbecause of the adequate friction between the saine and these suctioncups or cushions. In some cases it is desirable to provide some kind ofa support or retainer around the exterior of the cushion, and in F ig. 3there is shown a wire ring 13 encircling the cushion and acting inconjunction with the screw and disk to hold or fasten the cushion orsuction cup securely to the bar, such ring counteracting or overcomingany tendency for the rubber cushion to tear away from the bar or slataround its periphery or external portion. Such ring acts to stifl'en therubber at the lower section of the cushion and constitutes a confiningmember to assist in holding the cushion in place.

1n Fig. a a slightly modified construction is shown in which thecross-bar or slat of the conveyer or bed is provided in its top surfacewith a cylindrical recess or cavity 20` for each cushion 10 so that thelatter is partially accommodated within such recess, the upstandingflange or portion 21 around the cavity constituting a retaining andsupport--Y ing wall for the lower portion of the cushion. vThe upperedge of this wall, that is, the top surface of the bar 19, is desirablythough not necessarily, on substantially the same level as the topsurface of the disk or washer 13, although this feature of construction,as will be readily understood, is not absolutely essential. Sucharrangement of the parts, however, secures an adequate cooperatingholding or retaining effect of the various members constituting thesupporting device for the cushion.

'ln some instances and under some circumstances it is convenient anddesirable to supply a suitable space inside of the retaining wall of thecushion to permit the flowing, swelling or distorting of the rubberbrought about by the pressure exerted on the top of the cushion. Such amodified construction is shown in Fig. 5 in which the conveyer orcarrier 9 has on its top surface a sheet-metal cup or shell 22 having atits top an inturned flange or rim 23 circular in shape and acting as asupport for the portion ofthe rubber cushion which it surrounds. As isclearly indicated in Fig. 5, an annular space is provided beneath suchiiange, into which the rubber of the cushion may swell or enlarge orflow under pressure, the disk or washer 13, cushion 10, and shell or cup22 being all held or fastened to the bar 9 by a central screw 15.v As inthe instance shown in Fig. l, the flange 23 is desirably onsubstantially the same level as the top of the disk or washer 13, asufficient portion of the round vrubber cushion projectingabove theparts 13 and 23, to afford a yielding surface on which the board orother article being carried is adapted to rest. It will be observed thatthis rubber or resilient cushion 1()` is confined and fastened bothinternally and externally, whereby the maximum retaining andholding-effect is obtained, any tendency for dislodgment or displacementof the cushion being overcome and resistedv by the combined and conjointaction of the disk 13 and the the top surface of the bar 19, isdesirable, surrounding shell or cup 22, which, at the flange 23,pres-ents an opening for the accommodation of the cushion ofsubstantially the same diameter as the cushion. This cushion, however,has free Vplay to exert its resilient effectv on the board, being freeto swell or expand in the shell 22 beneath the flange In other words,rubber is not compressible to any great degree, it being merely capableof distortion or Vflowing at one part due to pressure brought upon someother part. It is because of this that the enlarOed or undercut cavityis provided in the shell 22.

The construction shown Yin 5 shows the bar 9 as provided with a slightdepression 24 for the accommodation of a small boss 25 struck downwardlyout of the base of the shell 22 and fitting in the cavity 24. This actsas a holding construction to prevent turning ot the cushion around thescrew 15 when the board being fed through the sand-papering or planingmachine covers only a portion of the cushion. Under such circumstances,as will be readily understood, there would be a tendency exerted on thecushion to revolve itV around its axis, that is, around the screw 15. c

1n Fig. 6 a slightly modified construction is shown, in which there isprovided a sheet-metal shell 26 which, instead of having an inturnedflange at its upper edge is supplied with a tapered wall 27, presentingat its top a round mouth of substantially the same size as the externaldiameter of the cushion 10 which it is adapted to accommodate. In thiscase, as in the instance shown in F ig. 5, the rubber or other resilientmaferial can expand or flow in the enlargedv space within the shell atthebase ofthe cushion.

The manner in which the rubberv flows, or expands, vor distorts, 1sshown'inVV ico Fig. 7. It enlarges above the top edge of the flange 27and swells into substantially the form shown Yinside the shell, thebottomisoV taining-effect on the cushion. The advancing part of therubber cushion is held from tearing away from the bar or slat by theshell, such section of the cushion being backed up by the internalwasher or disk 13. The rear portion of the cushion is held up in placeand supported by the flange of the shell and is also held down inposition by the central disk so that these combined holding-means act tomaintain the cushion in proper position and proper relation under theseverest conditions of service.

Vhile we have herein illustrated and described several embodiments ofthe invention, We Wish to have it understood that the same is not to belimited to the exact and precise constructions herein shown, as manyminor mechanical changes may be made in the same without departure 'fromthe substance and essence of our invention, and without the sacrifice ofany of its substantial benefits and advantages,

l/Vhat We claim is:

1. In a Wood-Working machine, the conibination of a bed, a resilientconcave cushion disposed thereon, and internally and externally arrangedmeans to secure the cushion to the bed, substantially as described.

2. In a wood working machine, the combination of a bed, a resilientconcave cushion disposed thereon, and internally and externally arrangedmeans to secure the cush ion to the bed, said securing means comprisinga shell having a base underlying and a Wall inclosing the cushion wallsand extending inwardly' into engagement with the upper portion of thecushion walls in combination with a retainer seated within the cavity ofthe cushion, and a fastening device attaching the retainer and bedthrough the bases of the cushion and shell, substantially as described.

3. In a Wood Working machine, the combination of a bed plate, aplurality of resilient concave cushions disposed thereon in spacedrelation to each other, and internally and externally arranged means tosecure the cushions to the bed, substantially as described.

4. In a wood working machine, the combination of a bed plate, aplurality of resilient concave cushions disposed thereon in spacedrelation to each other, and internally and externally arranged means tosecure the cushions to the bed, said securing means comprising a shellhaving a base underlying and a Wall inclosing the cushion Walls andextending inwardly into engagement with the upper portion of the cushionwalls in combination with a retainer seated within the cavity of thecushion, and a fastening device attaching the retainer and bed throughthe bases of the cushion and shell, substantially as described.

5. In a wood working machine, the combination of a bed plate, aplurality oi resilient concave cushions disposed thereon in spacedrelation to each other, and internally and externally arranged means tosecure the cushions to the bed, said securing means comprising a shellhaving a base underlying and a wall inclosing the cushion walls inspaced relation thereto in the lower portion and extending inwardly intoengagement with the upper portion of the cushion walls, in combinationwith a retainer seated within the cavity of the cushion, and a screwattaching the retainer and bed to the bases of the cushion and shell,substantially as described.

FRANKLIN L. LANE. HARRISON J. MITCHELL.

Witnesses VVAL'rnn M. FULLER, MILTON MILLER.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C.

